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Diastereoselective carbonate reduction
 | ||||
|---|---|---|---|---|
| Entry | R | Yield% (13) | Yield% (14) | dra |
| a | CH2iPr | 90 | 96 | >95:5 |
| b | iPr | 84 | 98 | >95:5 |
| c | Ph | 91 | 98 | >95:5 |
| d | Me | 90 | 98 | >95:5 |
| e | Me(ent-1)b | 90 | 98 | >95:5 |
| 7a | (CH2)2OTBS | 71 (13f) | 95 (8a) | >95:5 |
| 7b | (CH2)2OBn | 88 (13g) | 96 (8b) | >95:5 |
determined by 1H NMR
dienoate subjected to (DHQD)2PHAL
